From b11218c750ab92cfab4408a0328f1b36ceec3f33 Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jonas.gorski@gmail.com>
Date: Fri, 6 Jan 2012 12:24:18 +0100
Subject: [PATCH 19/63] NET: bcm63xx_enet: move phy_(dis)connect into probe/remove

Only connect/disconnect the phy during probe and remove, not during any
open/close. The phy seldom changes during the runtime, and disconnecting
the phy during close will prevent it from keeping any configuration over
a down/up cycle.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
---
 drivers/net/ethernet/broadcom/bcm63xx_enet.c |   84 +++++++++++++-------------
 1 files changed, 41 insertions(+), 43 deletions(-)

--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -871,10 +871,8 @@ static int bcm_enet_open(struct net_devi
 	struct bcm_enet_priv *priv;
 	struct sockaddr addr;
 	struct device *kdev;
-	struct phy_device *phydev;
 	int i, ret;
 	unsigned int size;
-	char phy_id[MII_BUS_ID_SIZE + 3];
 	void *p;
 	u32 val;
 
@@ -882,40 +880,10 @@ static int bcm_enet_open(struct net_devi
 	kdev = &priv->pdev->dev;
 
 	if (priv->has_phy) {
-		/* connect to PHY */
-		snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
-			 priv->mii_bus->id, priv->phy_id);
-
-		phydev = phy_connect(dev, phy_id, bcm_enet_adjust_phy_link,
-				     PHY_INTERFACE_MODE_MII);
-
-		if (IS_ERR(phydev)) {
-			dev_err(kdev, "could not attach to PHY\n");
-			return PTR_ERR(phydev);
-		}
-
-		/* mask with MAC supported features */
-		phydev->supported &= (SUPPORTED_10baseT_Half |
-				      SUPPORTED_10baseT_Full |
-				      SUPPORTED_100baseT_Half |
-				      SUPPORTED_100baseT_Full |
-				      SUPPORTED_Autoneg |
-				      SUPPORTED_Pause |
-				      SUPPORTED_MII);
-		phydev->advertising = phydev->supported;
-
-		if (priv->pause_auto && priv->pause_rx && priv->pause_tx)
-			phydev->advertising |= SUPPORTED_Pause;
-		else
-			phydev->advertising &= ~SUPPORTED_Pause;
-
-		dev_info(kdev, "attached PHY at address %d [%s]\n",
-			 phydev->addr, phydev->drv->name);
-
+		/* Reset state */
 		priv->old_link = 0;
 		priv->old_duplex = -1;
 		priv->old_pause = -1;
-		priv->phydev = phydev;
 	}
 
 	/* mask all interrupts and request them */
@@ -925,7 +893,7 @@ static int bcm_enet_open(struct net_devi
 
 	ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
 	if (ret)
-		goto out_phy_disconnect;
+		return ret;
 
 	ret = request_irq(priv->irq_rx, bcm_enet_isr_dma, 0,
 			  dev->name, dev);
@@ -1129,9 +1097,6 @@ out_freeirq_rx:
 out_freeirq:
 	free_irq(dev->irq, dev);
 
-out_phy_disconnect:
-	phy_disconnect(priv->phydev);
-
 	return ret;
 }
 
@@ -1236,12 +1201,6 @@ static int bcm_enet_stop(struct net_devi
 	free_irq(priv->irq_rx, dev);
 	free_irq(dev->irq, dev);
 
-	/* release phy */
-	if (priv->has_phy) {
-		phy_disconnect(priv->phydev);
-		priv->phydev = NULL;
-	}
-
 	return 0;
 }
 
@@ -1835,6 +1794,8 @@ static int bcm_enet_probe(struct platfor
 
 	/* MII bus registration */
 	if (priv->has_phy) {
+		struct phy_device *phydev;
+		char phy_id[MII_BUS_ID_SIZE + 3];
 
 		priv->mii_bus = mdiobus_alloc();
 		if (!priv->mii_bus) {
@@ -1872,6 +1833,38 @@ static int bcm_enet_probe(struct platfor
 			dev_err(&pdev->dev, "unable to register mdio bus\n");
 			goto out_free_mdio;
 		}
+
+		/* connect to PHY */
+		snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
+			 priv->mii_bus->id, priv->phy_id);
+
+		phydev = phy_connect(dev, phy_id, bcm_enet_adjust_phy_link,
+				     PHY_INTERFACE_MODE_MII);
+
+		if (IS_ERR(phydev)) {
+			dev_err(&pdev->dev, "could not attach to PHY\n");
+			goto out_unregister_mdio;
+		}
+
+		/* mask with MAC supported features */
+		phydev->supported &= (SUPPORTED_10baseT_Half |
+				      SUPPORTED_10baseT_Full |
+				      SUPPORTED_100baseT_Half |
+				      SUPPORTED_100baseT_Full |
+				      SUPPORTED_Autoneg |
+				      SUPPORTED_Pause |
+				      SUPPORTED_MII);
+		phydev->advertising = phydev->supported;
+
+		if (priv->pause_auto && priv->pause_rx && priv->pause_tx)
+			phydev->advertising |= SUPPORTED_Pause;
+		else
+			phydev->advertising &= ~SUPPORTED_Pause;
+
+		dev_info(&pdev->dev, "attached PHY at address %d [%s]\n",
+			 phydev->addr, phydev->drv->name);
+
+		priv->phydev = phydev;
 	} else {
 
 		/* run platform code to initialize PHY device */
@@ -1917,6 +1910,9 @@ static int bcm_enet_probe(struct platfor
 	return 0;
 
 out_unregister_mdio:
+	if (priv->phydev)
+		phy_disconnect(priv->phydev);
+
 	if (priv->mii_bus)
 		mdiobus_unregister(priv->mii_bus);
 
@@ -1961,6 +1957,8 @@ static int bcm_enet_remove(struct platfo
 	enet_writel(priv, 0, ENET_MIISC_REG);
 
 	if (priv->has_phy) {
+		phy_disconnect(priv->phydev);
+		priv->phydev = NULL;
 		mdiobus_unregister(priv->mii_bus);
 		mdiobus_free(priv->mii_bus);
 	} else {
